Nickanzolas

I just got my new 1600.2 and installed it running my door speakers and each channel is wired to 2 ohms i have 3 runs of 1/0 wire from knukonceptz 2 pos 1 neg and the big 3with dual batteries everything is grounded to the chassi but i am getting a lot of engine noise and the amp almost over heats at high volume after 5 min or less, the amp never sees less than 13.8v and i have the power and the rcas on separate sides any help or ideas would help out a lot thanks